Table 1.

Details of the three different EEG datasets.

Datasets	Action observation	Grasp and lift	Motor imagery
Sampling rate/s	250	500	250
Sensitivity/bit	0.024 μV/bit	0.1 μV/bit	100 μV/bit
Channels	64	32	22
Classification categories	2	6	4
Subject number	6	12	9
Trials/Subject	384	576	1,560
Trial duration/s	5 s	0.5 s	4 s
Device	NeuroScan SymAmp2	BrainAmp	Unknown